<?php

/**
 * 微信支付帮助库
 * ====================================================
 * 接口分三种类型：
 * 【请求型接口】--Wxpay_client_
 * 		统一支付接口类--UnifiedOrder
 * 		订单查询接口--OrderQuery
 * 		退款申请接口--Refund
 * 		退款查询接口--RefundQuery
 * 		对账单接口--DownloadBill
 * 		短链接转换接口--ShortUrl
 * 【响应型接口】--Wxpay_server_
 * 		通用通知接口--Notify
 * 		Native支付——请求商家获取商品信息接口--NativeCall
 * 【其他】
 * 		静态链接二维码--NativeLink
 * 		JSAPI支付--JsApi
 * =====================================================
 * 【CommonUtil】常用工具：
 * 		trimString()，设置参数时需要用到的字符处理函数
 * 		createNoncestr()，产生随机字符串，不长于32位
 * 		formatBizQueryParaMap(),格式化参数，签名过程需要用到
 * 		getSign(),生成签名
 * 		arrayToXml(),array转xml
 * 		xmlToArray(),xml转 array
 * 		postXmlCurl(),以post方式提交xml到对应的接口url
 * 		postXmlSSLCurl(),使用证书，以post方式提交xml到对应的接口url
 */
include_once("SDKRuntimeException.php");
include_once("WxPay.pub.config.php");

/**
 * 所有接口的基类
 */
class Common_util_pub{

  var $conf;

  function __construct($trade_type){
    $this->conf = new WxPayConf_pub($trade_type);
  }

  function trimString($value){
    $ret = null;
    if(null != $value){
      $ret = $value;
      if(strlen($ret) == 0){
        $ret = null;
      }
    }
    return $ret;
  }

  /**
   * 	作用：产生随机字符串，不长于32位
   */
  public function createNoncestr($length = 32){
    $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
    $str = "";
    for($i = 0; $i < $length; $i++){
      $str.= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
  }

  /**
   * 	作用：格式化参数，签名过程需要使用
   */
  function formatBizQueryParaMap($paraMap, $urlencode){
    $buff = "";
    ksort($paraMap);
    foreach($paraMap as $k => $v){
      if($urlencode){
        $v = urlencode($v);
      }
      //$buff .= strtolower($k) . "=" . $v . "&";
      $buff .= $k."=".$v."&";
    }
    $reqPar;
    if(strlen($buff) > 0){
      $reqPar = substr($buff, 0, strlen($buff) - 1);
    }
    return $reqPar;
  }

  /**
   * 	作用：生成签名
   */
  public function getSign($Obj){
    foreach($Obj as $k => $v){
      $Parameters[$k] = $v;
    }
    //签名步骤一：按字典序排序参数
    ksort($Parameters);
    $String = $this->formatBizQueryParaMap($Parameters, false);
    //echo '【string1】'.$String.'</br>';
    //签名步骤二：在string后加入KEY
    $String = $String."&key=".$this->conf->KEY;
    //dump($String);
    //签名步骤三：MD5加密
    $String = md5($String);
    //echo "【string3】 ".$String."</br>";
    //签名步骤四：所有字符转为大写
    $result_ = strtoupper($String);
    //echo "【result】 ".$result_."</br>";
    return $result_;
  }

  /**
   * 	作用：array转xml
   */
  function arrayToXml($arr){
    $xml = "<xml>";
    foreach($arr as $key => $val){
      if(is_numeric($val)){
        $xml.="<".$key.">".$val."</".$key.">";
      }else
        $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
    }
    $xml.="</xml>";
    return $xml;
  }

  /**
   * 	作用：将xml转为array
   */
  public function xmlToArray($xml){
    //将XML转为array        
    $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
    return $array_data;
  }

  /**
   * 	作用：以post方式提交xml到对应的接口url
   */
  public function postXmlCurl($xml, $url, $second = 30){
    //初始化curl        
    $ch = curl_init();
    //设置超时
    curl_setopt($ch, CURLOP_TIMEOUT, $second);
    //这里设置代理，如果有的话
    //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
    //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    //设置header
    curl_setopt($ch, CURLOPT_HEADER, FALSE);
    //要求结果为字符串且输出到屏幕上
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    //post提交方式
    curl_setopt($ch, CURLOPT_POST, TRUE);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
    //运行curl
    $data = curl_exec($ch);
    curl_close($ch);
    //返回结果
    if($data){
      curl_close($ch);
      return $data;
    }else{
      $error = curl_errno($ch);
      echo "curl出错，错误码:$error"."<br>";
      echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
      curl_close($ch);
      return false;
    }
  }

  /**
   * 	作用：使用证书，以post方式提交xml到对应的接口url
   */
  function postXmlSSLCurl($xml, $url, $second = 30){
    
    $ch = curl_init();
    //超时时间
    curl_setopt($ch, CURLOPT_TIMEOUT, $second);
    //这里设置代理，如果有的话
    //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8');
    //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    //设置header
    curl_setopt($ch, CURLOPT_HEADER, FALSE);
    //要求结果为字符串且输出到屏幕上
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    //设置证书
    //使用证书：cert 与 key 分别属于两个.pem文件
    //默认格式为PEM，可以注释
    curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
    curl_setopt($ch, CURLOPT_SSLCERT, $this->conf->SSLCERT_PATH);
    //默认格式为PEM，可以注释
    curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
    curl_setopt($ch, CURLOPT_SSLKEY, $this->conf->SSLKEY_PATH);
    //post提交方式
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
    $data = curl_exec($ch);
    
    
    /*记录日志*/
    $curl_info = curl_getinfo($ch);
    $curl_errno = curl_errno($ch);
    $lasttime = date('Y-m-d H:i:s',time());
    
    curl_close($ch);
    
    //     $loginfo['xml'] = $xml;
    //     $loginfo['key']  = $this->conf->SSLKEY_PATH;
    //     $loginfo['cert'] = $this->conf->SSLCERT_PATH;
    //     $loginfo['url'] = $url;
    //     $loginfo['return'] = $data;
    //     $loginfo['curl_info'] = $curl_info;
    //     $loginfo['curl_errno'] = $curl_errno;
    //     $loginfo['lasttime'] = $lasttime;
    //     set_log('ssl_refund',$loginfo,'证书');
    
    //返回结果
    if($data){
      return $data;
    }else{
      echo "curl出错，错误码:$curl_errno"."<br>";
      echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>";
      return false;
    }
  }

  /**
   * 	作用：打印数组
   */
  function printErr($wording = '', $err = ''){
    print_r('<pre>');
    echo $wording."</br>";
    var_dump($err);
    print_r('</pre>');
  }

}

/**
 * 请求型接口的基类
 */
class Wxpay_client_pub extends Common_util_pub{

  var $parameters; //请求参数，类型为关联数组
  public $response; //微信返回的响应
  public $result; //返回参数，类型为关联数组
  var $url; //接口链接
  var $curl_timeout; //curl超时时间

  function __construct($trade_type){
    parent::__construct($trade_type);
  }

  /**
   * 	作用：设置请求参数
   */
  function setParameter($parameter, $parameterValue){
    $this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
  }

  /**
   * 	作用：设置标配的请求参数，生成签名，生成接口参数xml
   */
  function createXml(){

    $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
    $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
    $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
    $this->parameters["sign"] = $this->getSign($this->parameters); //签名

    return $this->arrayToXml($this->parameters);
  }

  /**
   * 	作用：post请求xml
   */
  function postXml(){
    $xml = $this->createXml();
    $this->response = $this->postXmlCurl($xml, $this->url, $this->curl_timeout);
    return $this->response;
  }

  /**
   * 	作用：使用证书post请求xml
   */
  function postXmlSSL(){
    $xml = $this->createXml();
    $this->response = $this->postXmlSSLCurl($xml, $this->url, $this->curl_timeout);
    return $this->response;
  }

  /**
   * 	作用：获取结果，默认不使用证书
   */
  function getResult(){
    $this->postXml();
    $this->result = $this->xmlToArray($this->response);
    return $this->result;
  }

}

/**
 * 统一支付接口类
 */
class UnifiedOrder_pub extends Wxpay_client_pub{

  function __construct($trade_type){
    parent::__construct($trade_type);
    //设置接口链接
    $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
    //设置curl超时时间

    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    try{
      //检测必填参数
      if($this->parameters["out_trade_no"] == null){
        throw new SDKRuntimeException("缺少统一支付接口必填参数out_trade_no！"."<br>");
      }elseif($this->parameters["body"] == null){
        throw new SDKRuntimeException("缺少统一支付接口必填参数body！"."<br>");
      }elseif($this->parameters["total_fee"] == null){
        throw new SDKRuntimeException("缺少统一支付接口必填参数total_fee！"."<br>");
      }elseif($this->parameters["notify_url"] == null){
        throw new SDKRuntimeException("缺少统一支付接口必填参数notify_url！"."<br>");
      }elseif($this->parameters["trade_type"] == null){
        throw new SDKRuntimeException("缺少统一支付接口必填参数trade_type！"."<br>");
      }elseif($this->parameters["trade_type"] == "JSAPI" &&
          $this->parameters["openid"] == NULL){
        throw new SDKRuntimeException("统一支付接口中，缺少必填参数openid！trade_type为JSAPI时，openid为必填参数！"."<br>");
      }
      $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
      $this->parameters["spbill_create_ip"] = $_SERVER['REMOTE_ADDR']; //终端ip	    
      $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->parameters["sign"] = $this->getSign($this->parameters); //签名
      //dump($this->parameters);
      //set_log('wechatpay3',$this->parameters);
      return $this->arrayToXml($this->parameters);
    }catch(SDKRuntimeException $e){
      die($e->errorMessage());
    }
  }

  /**
   * 获取prepay_id
   */
  function getPrepayId(){
    $this->postXml();
    $this->result = $this->xmlToArray($this->response);
    if($this->result["prepay_id"]){
      F('WeixinPay/prepay_id/'.date('Ym').'/'.date('d').'/'.date('His').'-'.($this->result["prepay_id"]), $this->result);
    }else{
      F('WeixinPay/prepay_id/error/'.date('Ym').'/'.date('d').'/'.date('His').'-'.mt_rand(0, 99999), $this->result);
    }
    $prepay_id = $this->result["prepay_id"];
    return $prepay_id;
  }

}

/**
 * 订单查询接口
 */
class OrderQuery_pub extends Wxpay_client_pub{

  function __construct(){
    parent::__construct();
    //设置接口链接
    $this->url = "https://api.mch.weixin.qq.com/pay/orderquery";
    //设置curl超时时间
    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    try{
      //检测必填参数
      if($this->parameters["out_trade_no"] == null &&
          $this->parameters["transaction_id"] == null){
        throw new SDKRuntimeException("订单查询接口中，out_trade_no、transaction_id至少填一个！"."<br>");
      }
      $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
      $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->parameters["sign"] = $this->getSign($this->parameters); //签名
      return $this->arrayToXml($this->parameters);
    }catch(SDKRuntimeException $e){
      die($e->errorMessage());
    }
  }

}

/**
 * 退款申请接口
 */
class Refund_pub extends Wxpay_client_pub{

  function __construct($trade_type){
    parent::__construct($trade_type);
    //设置接口链接
    $this->url = "https://api.mch.weixin.qq.com/secapi/pay/refund";
    //设置curl超时时间
    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    try{
      //检测必填参数
      if($this->parameters["out_trade_no"] == null && $this->parameters["transaction_id"] == null){
        throw new SDKRuntimeException("退款申请接口中，out_trade_no、transaction_id至少填一个！"."<br>");
      }elseif($this->parameters["out_refund_no"] == null){
        throw new SDKRuntimeException("退款申请接口中，缺少必填参数out_refund_no！"."<br>");
      }elseif($this->parameters["total_fee"] == null){
        throw new SDKRuntimeException("退款申请接口中，缺少必填参数total_fee！"."<br>");
      }elseif($this->parameters["refund_fee"] == null){
        throw new SDKRuntimeException("退款申请接口中，缺少必填参数refund_fee！"."<br>");
      }elseif($this->parameters["op_user_id"] == null){
        throw new SDKRuntimeException("退款申请接口中，缺少必填参数op_user_id！"."<br>");
      }
      $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
      $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->parameters["sign"] = $this->getSign($this->parameters); //签名
      return $this->arrayToXml($this->parameters);
    }catch(SDKRuntimeException $e){
      die($e->errorMessage());
    }
  }

  /**
   * 	作用：获取结果，使用证书通信
   */
  function getResult(){
    
    $this->postXmlSSL();
    //$this->postXml();
    $this->result = $this->xmlToArray($this->response);
    return $this->result;
  }

}

/**
 * 退款查询接口
 */
class RefundQuery_pub extends Wxpay_client_pub{

  function __construct($trade_type){
    parent::__construct($trade_type);
    //设置接口链接
    $this->url = "https://api.mch.weixin.qq.com/pay/refundquery";
    //设置curl超时时间
    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    try{
      if($this->parameters["out_refund_no"] == null &&
          $this->parameters["out_trade_no"] == null &&
          $this->parameters["transaction_id"] == null &&
          $this->parameters["refund_id "] == null){
        throw new SDKRuntimeException("退款查询接口中，out_refund_no、out_trade_no、transaction_id、refund_id四个参数必填一个！"."<br>");
      }
      $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
      $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->parameters["sign"] = $this->getSign($this->parameters); //签名
      return $this->arrayToXml($this->parameters);
    }catch(SDKRuntimeException $e){
      die($e->errorMessage());
    }
  }

  /**
   * 	作用：获取结果，使用证书通信
   */
  function getResult(){
    $this->postXmlSSL();
    $this->result = $this->xmlToArray($this->response);
    return $this->result;
  }

}

/**
 * 对账单接口
 */
class DownloadBill_pub extends Wxpay_client_pub{

  function __construct(){
    parent::__construct();
    //设置接口链接
    $this->url = "https://api.mch.weixin.qq.com/pay/downloadbill";
    //设置curl超时时间
    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    try{
      if($this->parameters["bill_date"] == null){
        throw new SDKRuntimeException("对账单接口中，缺少必填参数bill_date！"."<br>");
      }
      $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
      $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->parameters["sign"] = $this->getSign($this->parameters); //签名
      return $this->arrayToXml($this->parameters);
    }catch(SDKRuntimeException $e){
      die($e->errorMessage());
    }
  }

  /**
   * 	作用：获取结果，默认不使用证书
   */
  function getResult(){
    $this->postXml();
    $this->result = $this->xmlToArray($this->result_xml);
    return $this->result;
  }

}

/**
 * 短链接转换接口
 */
class ShortUrl_pub extends Wxpay_client_pub{

  function __construct(){
    parent::__construct();
    //设置接口链接
    $this->url = "https://api.mch.weixin.qq.com/tools/shorturl";
    //设置curl超时时间
    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    try{
      if($this->parameters["long_url"] == null){
        throw new SDKRuntimeException("短链接转换接口中，缺少必填参数long_url！"."<br>");
      }
      $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
      $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->parameters["sign"] = $this->getSign($this->parameters); //签名
      return $this->arrayToXml($this->parameters);
    }catch(SDKRuntimeException $e){
      die($e->errorMessage());
    }
  }

  /**
   * 获取prepay_id
   */
  function getShortUrl(){
    $this->postXml();
    $prepay_id = $this->result["short_url"];
    return $prepay_id;
  }

}

/**
 * 响应型接口基类
 */
class Wxpay_server_pub extends Common_util_pub{

  public $data; //接收到的数据，类型为关联数组
  var $returnParameters; //返回参数，类型为关联数组

  function __construct($trade_type){
    parent::__construct($trade_type);
  }

  /**
   * 将微信的请求xml转换成关联数组，以方便数据处理
   */
  function saveData($xml){
    $this->data = $this->xmlToArray($xml);
  }

  function checkSign(){
    $tmpData = $this->data;
    unset($tmpData['sign']);
    $sign = $this->getSign($tmpData); //本地签名
    if($this->data['sign'] == $sign){
      return TRUE;
    }
    return FALSE;
  }

  /**
   * 获取微信的请求数据
   */
  function getData(){
    return $this->data;
  }

  /**
   * 设置返回微信的xml数据
   */
  function setReturnParameter($parameter, $parameterValue){
    $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    return $this->arrayToXml($this->returnParameters);
  }

  /**
   * 将xml数据返回微信
   */
  function returnXml(){
    $returnXml = $this->createXml();
    return $returnXml;
  }

}

/**
 * 通用通知接口
 */
class Notify_pub extends Wxpay_server_pub{

  function __construct($trade_type){
    parent::__construct($trade_type);
  }

}

/**
 * 请求商家获取商品信息接口
 */
class NativeCall_pub extends Wxpay_server_pub{

  function __construct(){
    parent::__construct();
  }

  /**
   * 生成接口参数xml
   */
  function createXml(){
    if($this->returnParameters["return_code"] == "SUCCESS"){
      $this->returnParameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->returnParameters["mch_id"] = $this->conf->MCHID; //商户号
      $this->returnParameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->returnParameters["sign"] = $this->getSign($this->returnParameters); //签名
    }
    return $this->arrayToXml($this->returnParameters);
  }

  /**
   * 获取product_id
   */
  function getProductId(){
    $product_id = $this->data["product_id"];
    return $product_id;
  }

}

/**
 * 静态链接二维码
 */
class NativeLink_pub extends Common_util_pub{

  var $parameters; //静态链接参数
  var $url; //静态链接

  function __construct(){
    parent::__construct();
  }

  /**
   * 设置参数
   */
  function setParameter($parameter, $parameterValue){
    $this->parameters[$this->trimString($parameter)] = $this->trimString($parameterValue);
  }

  /**
   * 生成Native支付链接二维码
   */
  function createLink(){
    try{
      if($this->parameters["product_id"] == null){
        throw new SDKRuntimeException("缺少Native支付二维码链接必填参数product_id！"."<br>");
      }
      $this->parameters["appid"] = $this->conf->APPID; //公众账号ID
      $this->parameters["mch_id"] = $this->conf->MCHID; //商户号
      $time_stamp = time();
      $this->parameters["time_stamp"] = "$time_stamp"; //时间戳
      $this->parameters["nonce_str"] = $this->createNoncestr(); //随机字符串
      $this->parameters["sign"] = $this->getSign($this->parameters); //签名    		
      $bizString = $this->formatBizQueryParaMap($this->parameters, false);
      $this->url = "weixin://wxpay/bizpayurl?".$bizString;
    }catch(SDKRuntimeException $e){
      die($e->errorMessage());
    }
  }

  /**
   * 返回链接
   */
  function getUrl(){
    $this->createLink();
    return $this->url;
  }

}

/**
 * JSAPI支付——H5网页端调起支付接口
 */
class JsApi_pub extends Common_util_pub{

  var $code; //code码，用以获取openid
  var $openid; //用户的openid
  var $parameters; //jsapi参数，格式为json
  var $prepay_id; //使用统一支付接口得到的预支付id
  var $curl_timeout; //curl超时时间

  function __construct(){
    parent::__construct();
    //设置curl超时时间
    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   * 	作用：生成可以获得code的url
   */
  function createOauthUrlForCode($redirectUrl){
    $urlObj["appid"] = $this->conf->APPID;
    $urlObj["redirect_uri"] = "$redirectUrl";
    $urlObj["response_type"] = "code";
    $urlObj["scope"] = "snsapi_base";
    $urlObj["state"] = "STATE"."#wechat_redirect";
    $bizString = $this->formatBizQueryParaMap($urlObj, false);
    return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizString;
  }

  /**
   * 	作用：生成可以获得openid的url
   */
  function createOauthUrlForOpenid(){
    $urlObj["appid"] = $this->conf->APPID;
    $urlObj["secret"] = $this->conf->APPSECRET;
    $urlObj["code"] = $this->code;
    $urlObj["grant_type"] = "authorization_code";
    $bizString = $this->formatBizQueryParaMap($urlObj, false);
    return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizString;
  }

  /**
   * 	作用：通过curl向微信提交code，以获取openid
   */
  function getOpenid(){
    $url = $this->createOauthUrlForOpenid();
    //初始化curl
    $ch = curl_init();
    //设置超时
    curl_setopt($ch, CURLOP_TIMEOUT, $this->curl_timeout);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_HEADER, FALSE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    //运行curl，结果以jason形式返回
    $res = curl_exec($ch);
    curl_close($ch);
    //取出openid
    $data = json_decode($res, true);
    $this->openid = $data['openid'];
    return $this->openid;
  }

  /**
   * 	作用：设置prepay_id
   */
  function setPrepayId($prepayId){
    $this->prepay_id = $prepayId;
  }

  /**
   * 	作用：设置code
   */
  function setCode($code_){
    $this->code = $code_;
  }

  /**
   * 	作用：设置jsapi的参数
   */
  public function getParameters(){
    $jsApiObj["appId"] = $this->conf->APPID;
    $timeStamp = time();
    $jsApiObj["timeStamp"] = "$timeStamp";
    $jsApiObj["nonceStr"] = $this->createNoncestr();
    $jsApiObj["package"] = "prepay_id=$this->prepay_id";
    $jsApiObj["signType"] = "MD5";
    $jsApiObj["paySign"] = $this->getSign($jsApiObj);
    $this->parameters = json_encode($jsApiObj);
    return $this->parameters;
  }

  /**
   * 	作用：设置jsapi的参数
   */
  public function getParametersArr($prepay_id){
    $jsApiObj["appId"] = $this->conf->APPID;
    $timeStamp = time();
    $jsApiObj["timeStamp"] = "$timeStamp";
    $jsApiObj["nonceStr"] = $this->createNoncestr();
    $jsApiObj["package"] = "prepay_id=".$prepay_id;
    $jsApiObj["signType"] = "MD5";
    $jsApiObj["paySign"] = $this->getSign($jsApiObj);
    return $jsApiObj;
  }

}

/**
 * 获取用户openid
 */
class WxOpenId_pub extends Common_util_pub{
  var $code; //code码，用以获取openid
  var $openid; //用户的openid
  var $curl_timeout; //curl超时时间

  function __construct(){
    parent::__construct();
    //设置curl超时时间
    $this->curl_timeout = $this->conf->CURL_TIMEOUT;
  }

  /**
   *  作用：生成可以获得code的url
   */
  function createOauthUrlForCode($redirectUrl){
    $urlObj["appid"] = C('WECHAT_APPID');
    $urlObj["redirect_uri"] = "$redirectUrl";
    $urlObj["response_type"] = "code";
    $urlObj["scope"] = "snsapi_base";
    $urlObj["state"] = "STATE"."#wechat_redirect";
    $bizString = $this->formatBizQueryParaMap($urlObj, false);
    return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizString;
  }

  /**
   *  作用：生成可以获得openid的url
   */
  function createOauthUrlForOpenid(){
    $urlObj["appid"] = C('WECHAT_APPID');
    $urlObj["secret"] = C('WECHAT_SECRET');
    $urlObj["code"] = $this->code;
    $urlObj["grant_type"] = "authorization_code";
    $bizString = $this->formatBizQueryParaMap($urlObj, false);
    return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizString;
  }

  /**
   *  作用：通过curl向微信提交code，以获取openid
   */
  function getOpenid(){
    $url = $this->createOauthUrlForOpenid();
    //初始化curl
    $ch = curl_init();
    //设置超时
    curl_setopt($ch, CURLOP_TIMEOUT, $this->curl_timeout);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_HEADER, FALSE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    //运行curl，结果以jason形式返回
    $res = curl_exec($ch);
    curl_close($ch);
    //取出openid
    $data = json_decode($res, true);
    $this->openid = $data['openid'];
    return $this->openid;
  }

  /**
   *  作用：设置code
   */
  function setCode($code_){
    $this->code = $code_;
  }
}

?>
